The Mountain Equipment Women's Classic 1000 is a very warm down sleeping bag filled with pure duck down. The sleeping bag was specifically designed to meet the needs of women. It is relatively lightweight and very packable. The sleeping bag is ideal for trekking and adventurous travel in cold conditions or at higher altitudes where temperatures drop well below freezing. The sleeping bag's mountain fit with the zoned EXL system makes it spacious and thermally efficient. The EXL technology serves to optimise the loft of the down as well as its thermal efficiency. The 2 baffle anatomically shaped footbox is also roomy and warm. As for the outer shell, a soft nylon fabric was used that is tearproof and downproof. Plus, it is windproof and breathable. Of course, the Mountain Equipment Women's Classic 1000 down sleeping bag comes with a waterproof stuff sack to keep it dry as well as a cube for storing the bag between tours. With the Mountain Equipment Women's Classic 1000, you'll have a warm, high-quality sleeping bag for your next adventure.